<!DOCTYPE html>
<html>

	<head>
		<meta charset="utf-8" />
		<meta http-equiv="X-UA-Compatible" content="IE=edge">
		<title>css-task1</title>
		<meta name="viewport" content="width=device-width, initial-scale=1">
		<style>
			html,
			body {
				width: 100%;
				height: 100%;
				padding: 0;
				margin: 0;
			}
			.container {
				max-width: 750px;
				margin:20px auto;
				
			}
			ul{
				display: flex;
				flex-wrap:wrap;
				margin:0;
				padding:0;
			}
			ul>li {
				list-style-type: none;
				width:30%;
				height:0;
				padding-bottom: 30%;
				flex-grow:3;
				margin:1.5%;
				background-color: #ffa600;
				border-radius:15%;
			}
			
		</style>
	</head>

	<body>
		<div class="container">
			<ul>
				<li></li>
				<li></li>
				<li></li>
				<li></li>
				<li></li>
				<li></li>
				<li></li>
				<li></li>
				<li></li>
			</ul>
			
		</div>
	</body>

</html>